P117B Possible Causes
- Fuel injector
- Exhaust gas leaks
- Poor fuel pressure
- Mass air flow meter
- Intake air leaks
- Lack of fuel
- Poor PCV hose connection
- Incorrect spark plug
- Insufficient compression
- Fuel injector circuit open or shorted
- Ignition coil
- Ignition signal circuit open or shorted
How to Fix Code P117B?
Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
- Engine light on (or engine service warning light soon)
P117B Meaning
The Engine Control Module (ECM) monitors the lean/rich air-fuel ratio status in any cylinder. The ECM sets the OBDII code when it detects a lean/rich air-fuel ratio condition in any cylinder for a specified duration.